Add field metadata to django-rest-framework serializer

I am writing an API using django-rest-framework that is used to display custom tables at the frontend.

I need to add metadata to the json returned by model serializer:

• provide custom display name for nearly all fields;
• mark some fields unsortable so that sorting controls are not displayed in the UI for corresponding columns;
• specify header rotation angle for narrow columns.

I tried googling this but all I find is how to add a custom non-model field to ModelSerializer.